DE2425139A1 - Connection for relatively movable pipes - has central vee connector releasable at preset tensile load and anular channels to retain fluid - Google Patents

Abstract

Pipes such as (10) are bolted to either end of a connector which is made in two parts (15) secured together by a cylindrical vee clamp (21) which is designed to release connector parts under a predetermined tensile load. A central body in the connector forces the flowing medium to flow around its periphery through a cylindrical passage closable by cylindrical piston, should the connection fail, in order to prevent loss of fluid. The pistons are caused to move to close the pipes by means of pneumatic control pressure applied through ports by an external pressure source. The connection is partic. for use with oil tanker filling systems.

Description

Fitting for pipelines for the transport of media Addendum to patent .... (Patent application P 23 18 165.9 The invention relates to a valve for pipelines for the transport of media that have an annular sealing surface has an element arranged transversely to the pipe axis, which has at least a web is connected to a sealing sleeve which is coaxial with the housing in a housing Pipeline is arranged, and around which a sliding sleeve is sealing and displaceable is guided, wherein the housing has a bore coaxial to the pipe axis, in which the outside of the sliding sleeve slides sealingly and the bore wall in the Area of the transverse element has a recess, which in the open position of the Slider sleeve forms a passage with the transverse element while in the closed position the slide sleeve this into sealing engagement with the annular sealing surface occurs, according to patent ... (patent application P 23 18 165.9).

It is already such a valve as a shut-off device for a piggable # 'filling valve for liquid and / or pasty media has been proposed. Such a fitting is characterized by a number of advantages.

The slide sleeve that controls the passage of the valve is pressure-relieved and can therefore also be brought into any intermediate position in order to achieve a corresponding To ensure dosing of the medium to be filled. It is also easily piggable with relatively low residual quantities. Appropriate training of the The transverse element ensures that the pig that hits it, despite the high kinetic energy will not be damaged. In addition, such a fitting does not have a stuffing box and particularly suitable for below-level fillings. It is easy and quick to dismantle. and can be assembled and produced with extremely little effort. Finally is such a fitting is extremely robust and low-wear.

There are in hydraulics, pneumatics, in the transport of media through Hoses, pipelines and similar means of transport and in other fields the frequently encountered requirement that a pipeline connection at least one end of the pipe ends to be separated from one another must close to the outlet of the transmitted medium. In hydraulics or pneumatics, in is enough many This does not happen if the line connections to be connected are spring loaded struck valves are provided which close automatically when the line connection is separated. In particular, however, with larger nominal widths, e.g. for pipelines For pumping oil, chemicals and similar media, just one light is enough delayed closing of the shut-off valves to allow large quantities to drain off. This is precisely in view of the growing requirements in terms of environmental purity no longer justifiable, so that solutions have to be found, the exit of a To prevent fluid completely if the line coupling is disconnected.

A similar problem exists e.g. with pipeline loading systems, such as ship loading systems for oil or others to be pumped via pipelines Media in which there is no relative movement between the place of delivery and the place of delivery is to be avoided. When loading or unloading an oil tanker, a different one must be used The position of the ship can be calculated, among other things from the Ti-denstand, the swell and other influencing factors. The connection between a stationary pipeline on land and a quasi-stationary pipeline on the ship is through a means Swivel joints and other connecting elements made moveable pipeline manufactured. Despite this mobility can only be limited horizontally and vertical connection area are observed. If this connection area is exceeded, a previously set separable coupling (predetermined breaking point) ensures that it is disconnected. This prevents the entire loading system from being damaged or even destroyed will. Similar difficulties exist with other loading facilities that work with moving pipelines.

The object of the invention is to provide a simply constructed, effectively working To create valve for separable pipeline connections.

The solution of the invention is based on a filling valve for pipelines of the type mentioned above. The invention consists in the use of this valve as a shut-off valve on a separable pipe connection on at least one Side of the separation point, with the housing over the separation point with a connector is connectable.

At any desired time before disconnecting the pipeline connection, at the same time or thereafter, the sliding sleeve can move out of the open position into which it releases the passage through the pipeline connection, in the closed position be brought to prevent the escape of further medium. Especially with big ones Cross-sections the slide sleeve can move into the closed position at a correspondingly low speed be driven in order to reduce shock loads due to the choke effect, which may lead to destruction the system to switch off.

As already stated in the introduction, this is the case Faucet characterized by a number of technical advantages, among. which especially the to name the simple structure, the compactness and robustness as well as the small construction are. In addition, # there are no difficulties in the housing of the shut-off valve to be connected to a connector using suitable coupling means.

In many cases it is sufficient, especially when pumping without pressure liquid media, just a shut-off valve on one side of the separation point, to be provided in front of the separation point, seen in the direction of flow.

In other cases where counter pressure is used, e.g.

Liquid gas, care must be taken to ensure that the separation point is closed is closed on both sides in order to prevent the medium from flowing back to the outside impede. For this purpose it is provided according to the invention that on both sides a shut-off valve is attached to the separation point.

In another embodiment of the invention, on each side the separation point a shut-off valve is arranged, it is provided that the transverse elements on the ends facing each other flat, perpendicular to the pipe axis Had surfaces that lie against each other and form a parting plane, and that the Ends of the slide sleeves extend up to the level of the parting plane.

The actuation of the slide sleeves for the purpose of opening or

Closing the passage through the pipeline connection can through suitable actuators take place. It is particularly advantageous if according to the invention the slide sleeve has a piston section which can be acted upon by fluid on both sides having. The piston section can be integrally formed onto the slide sleeve as a flange be, the piston section in an annular cylinder bore provided in the housing of the valve slides sealingly.

The piston section is acted upon hydraulically, depending on the size or pneumatic. However, it is also conceivable to have the slide sleeve on one side to act on a spring that keeps the slide sleeve in the closed position bring addiction. The back pressure is generated by a fluid. Once the If the fluid pressure disappears, the spring brings the slide sleeve into the closed position.

In another embodiment of the invention it is provided that the fluid lines to act on both sides in the direction of flow seen rear slide sleeve with corresponding channels in the housing of the front Shut-off valve are connected that these channels via the separation point with channels in the housing of the rear shut-off valve that are connected to the interior rooms guide on both sides of the piston section of the rear slide sleeve. For such a one In this case, the fluid control lines are only connected to a housing, which is arranged, for example, stationary or quasi-stationary, so that at one Disconnecting the pipeline connection, the other housing can be removed at will, without the control lines being destroyed. For such a case it is too advantageous, seen in the direction of flow, the rear slide sleeve with a spring to be applied in the closed position, since after disconnecting the pipeline connection the control channels are also interrupted and the rear slide sleeve is no longer can be brought into the closed position by fluid pressure. This function will then taken over by the pen.

It is in this context that an embodiment of the invention also sees before that the channels in the housing of the front shut-off valve have a safety valve included, the valve member in the non-separated state of the valve from a Housing section the rear valve is held in the open position. As long as the pipeline connection is coupled, the safety valves remain open. The e.g. against spring force adjustable valve members are through a portion of the flow direction viewed rear housing held in the open position. As soon as this housing is dated the front housing is removed, the safety valves close automatically and prevent control fluid from escaping into the open.

The pipeline connection or the coupling between the one another pipe or pipe sections to be connected can be designed in any way, it only has to be ensured that a separation of the clutch at a given Value occurs, for example when predetermined tensile or shear loads are reached or when a certain swivel angle is reached opposite a swiveling pipeline a stationary or quasi-stationary connection point. An embodiment of the For this purpose, the invention provides that the housing has a shut-off valve with a connecting piece or the housing of the other shut-off valve by a separable one, the housing surrounding coupling ring can be connected to one another. The coupling ring is preferred a flange ring made of two halves connected to one another by means of a joint, the free ends of which can be connected to one another by a separable connecting arrangement are. One possible embodiment is to have the housing with outer converging To provide conical surfaces against which the double conical surfaces of the Flange ring abut so that the housing when the flange ring is drawn together radially be pressed firmly against each other. The connection assembly pulls the flange ring together, with the help of a suitable actuator. In this Another embodiment of the invention provides that the connection arrangement two locking elements pivotable about a pivot pin arranged on one of the housings has, which are provided with open slots, the locking pins on the flange ring take up that means are provided that an equiangular pivoting of the locking elements ensure that an actuator engages the locking elements, through which the locking elements can be pivoted.

The locking elements are used to open or close the flange ring each pivoted by the same angle in opposite directions, so that the on the flange ring radially arranged locking pins away from each other or on top of each other to be moved. It is important to pivot around the same angle to ensure this is that, especially when opening, not one half of the ring in front of the.

others are released, which would otherwise block the separation process can lead.

The locking elements are preferably operated by an actuator adjusted, which has two slots in a row, the actuating pin of the locking elements. An adjusting cylinder, for example, engages on the actuator by means of which the actuators are pivoted into the closed or open position can be.

This now ensures that as little medium as possible is used when separating the pipeline connection to the outside, the shut-off valves are controlled and the process of separating the pipeline connection preferably so that initially the Seen in the direction of flow, the first slide sleeve is moved into the closed position. In some cases this happens slowly to sudden throttling effects To prevent shock loads from a media column in front of the shut-off valve. Then the rear slide sleeve is closed, after which a separation the pipeline connection is initiated. The signal that initiates these processes can be triggered, for example, by limit switches on a moving pipeline will. However, numerous other applications are also conceivable in which other sensing devices take over this function.

As already mentioned, the design of the separable pipe coupling of subordinate importance for the function of the shut-off valves, since these too to work effectively with other clutches than the embodiments described above capital.

In addition to the advantages of the invention described above, there still remains to mention that up to the cross element in the shut-off valves the piggeability of a System is obtained. For this purpose the transverse elements are in their of the pipeline The surface facing it is preferably dome-shaped in order to be able to move at high speed to protect the newt as far as possible. In addition, in the field of Shut-off valve a supply line for a control medium to be provided to the pig to send back to the transmitting station at the cross element.

An embodiment of the invention will be described below with reference to drawings are described in more detail.

Fig. 1 shows a section through a separable pipeline connection with two shut-off valves.

FIG. 2 shows a section through the arrangement according to FIG. 1 with a view on a coupling ring.

FIG. 3 shows a side view of the arrangement according to FIG. 2.

FIG. 4 shows a second side view of the arrangement according to FIG. 2.

Through a pipe 10, for example with a stationary Tank is connected, the medium to be pumped is conveyed, e.g. oil. To the pipeline 10, a housing 11 is flanged, which consists of an upper section 12 and a lower section 13 is composed, which are connected to one another by means of bolts 14 will. A further housing 15 is attached to the housing 11, which also consists of a section 16 and a section 17, which are connected to one another via bolts 18 are screwed. The housing 15 is provided with a connecting pipe piece, not shown connected, which can be connected, for example, to a ship connector.

Pipeline 10, housing 11 and 15 and connecting pipe section can, for. B. be part of a movable ship loading facility. The housings 11 and 15 represent parts of two shut-off valves that are connected to a separable pipe coupling be held together. For this purpose, the housing sections 13 and 16 are included converging conical annular surfaces 19, 20 provided around which a two-part, coupling ring 21 provided with corresponding conical ring surfaces is laid around, so that with a radial loading of the coupling ring, the housing sections 13 and 16 are drawn together and the flat ones, perpendicular to the pipe axis trending Stop surfaces 22 and 23 are brought into firm sealing contact. Another Sealing takes place by an annular seal 24 in the housing section 16. The stop surfaces 22 and 23 contain several recesses offset from one another over a circumference, are inserted into the centering balls 24 so that the housing 11 and 15 at a Separating the pipeline connection can be correctly oriented to each other again.

In the housing 11, a sealing sleeve 25 is arranged coaxially to the pipeline lo and provided with the same diameter as the latter. A ring shoulder 26 of the Housing 11 presses a flange 27 into firm contact with the flange of the pipeline 10. In a similar way, a sealing sleeve 28 from the housing section 17 is not shown Connecting pipe piece held. The housing sections 12 and 13 or 16 and 17 form with the sealing sleeves 25 and 28 annular chambers 29 and 30, in which a slide sleeve 31 or 32 is arranged to be axially movable. To the slide sleeve 31 or 32 is a Piston flange 33 or 34 integrally formed. The piston flange 33 or 34 divides the annular chambers 29 and 30 in two cylinder chambers.

The inside of the slide sleeves 31 and 32 slides on in a sealing manner the outside of the sealing sleeve 25 or

29. For this purpose the slide sleeve is 31leu. 32 with two Seals 35, 36 or 37, 38 are provided. 28, a transverse element 39 or 40 is integrally formed, which is connected via circular arc-shaped webs 41 respectively.

42 is connected to the sealing sleeve 25 and 28, respectively. The cross element 39 or 40 has a dome-shaped surface on its surface facing the pipeline Recess 43 or

44. On the opposite side is the cross member 39 or 40 provided with a flat surface perpendicular to the pipe axis. The opposing flat surfaces of the transverse elements 39 and 40 form together with the stop surfaces 22 and 23, the parting plane of the pipeline connection.

The transverse elements 39 and 40 form annular sealing surfaces 45, 46, in the open position of the slide sleeves 25, 28 on the left side of Fig. 1 is shown with coaxial bores of the same diameter of the housing sections 13, 16 form an annular flow passage. In the closed position of the Sliding sleeves 31 and 32, which is shown on the right side of Fig. 1, If the slide sleeves come into sealing engagement with the sealing surfaces 45 and 46, to block the passage of fluid. The sliding sleeves are used for this purpose 31, 32 provided with unmarked seals.

The actuation of the slide sleeves 31 and 32 takes place when pressure medium is applied of the piston sections 33 and 34.

For this purpose, the upper housing section 12 has a channel 47, which is in communication with the upper portion of the annular chamber 29, and the lower housing section 13 has a channel 48 which communicates with the lower section of the Annular chamber 29 is in communication. To the channels 47 and 48 are pneumatic or hydraulic control pressure lines can be connected to slide the slide sleeve 31 into the opening to bring or closed position. The pneumatic or hydraulic control connection for the lower annular chamber 30 is also located in the lower housing section 13 of the upper housing 11. This has a channel 49 which extends up to the separating surface 22 runs. Another channel 50, which is only shown in dashed lines, forms another control channel, which also runs as far as the separating surfaces 22 and 23, respectively. The channels 49 and 50 are aligned at the interface with channels 51, 52, the former extends through the housing section 16 and the housing section 17, and a connection to the lower part of the annular chamber 30 forms, while the channel 52 only through the Housing portion 16 extends and the upper portion of the annular chamber 30 with a Control pressure source connects. In the control pressure channels 49 and 50 there are safety valve arrangements 53, 54 are provided, the non-designated valve member in the coupled state of Shut-off valves shown is held in the open position. Once the shut-off valves however, are separated from each other, they are in the closed position by the control medium pressure and prevent the escape of control fluid into the atmosphere.

The piston portion 34 of the lower slide sleeve 32 is of several Springs 55 acted upon, which press the slide sleeve 32 into the closed position Looking for.

The separable pipeline connection is shown in more detail in FIGS. 2 to 4 shown. The coupling ring 21 consists of two halves 56, 57, which on one The ends are connected to one another via a joint 58. In Fig. 2 it is strongly drawn out Lines show the coupling position and the decoupling position in dash-dotted lines of the coupling ring 21 indicated. The ring halves 56 are at the other free end and 57 with locking pins 59, 60 provided.

Two locking elements are located above bearing journals 61, 62 on the housing 15 63, 64 rotatably mounted. The locking elements 63 and 64 have open slots 65, 66, which in the closed position or coupling position, the locking pin 59, 60 record. The locking element 63 is also provided with two teeth 67, which form a tooth gap in which a tooth 68 of the locking element 64 in the Locked position engages. The locking elements 63 and 64 are finally provided with actuating pins 69, 70, one of the slots lying in a row Frog 71 are received, which is pivotable with the piston 72 of a hydraulic Adjusting cylinder 73 is connected. The adjusting cylinder 73 is in turn pivotable connected to the unmarked connecting pipe.

The pipeline connection shown in Figures 1 to 4 with shut-off valves has the task of being separated in a simple way in the desired case and by Timely closing of the shut-off valves prevents the medium to be pumped from escaping to prevent the outside world. This can, for example, be the case with a ship loading facility of the Be the case in which the vertical or horizontal closure area is exceeded. However, this can also be done in many other cases where a moving pipeline is used.

If such a decoupling occurs, the in the direction of flow Initially in the front sliding sleeve by applying appropriate pressure Brought closed position. Depending on the pressure conditions and the length and width the present line closes the slide sleeve 31 more or less fast. Slow closing is preferable, especially for large widths, in order to keep a harmful shock pressure load away from the arrangement.

Following the closing of the slide sleeve 31, the slide sleeve 32 moved into the closed position.

This is also done by applying pressure to the piston section accordingly 34 from below. The springs 55 support this process. Only after the shut-off valves closed are, the actuation of the locking elements takes place via the adjusting cylinder 23 63 and 64, such that they are pivoted about the pins 61 and 62 away from each other, until the slots 65 and 66 release the locking pins 59 and 60 so that the Ring halves 56 and 57 the conical locking ring surfaces 19 and 20 (Fig. 1) can release and ensure that the shut-off valves also laterally against each other can be postponed if the circumstances so require. Teeth 67 and 68 ensure that the locking elements 63 and 64 are only the same Angle are each pivoted, whereby the locking pins 59 and 60 only can be released at the same time. The simultaneous release of the locking pins 59 and 60 is crucial, as otherwise the coupling will jam can.

The easy release of the locking pins 59, 60 and the renewed Locking when the coupling ring 21 is open is due to the diverging arrangement the slots 65 and 66 and by correspondingly rounded noses, not designated reached, with the facing noses extending a little further outward than the turned away noses.

As can be seen in particular from Fig. 1, the pipeline connection allows with shut-off valves also a pigging of the pipelines up to the cross elements 39 and 40. If piggeability is provided, appropriate fluid channels must be used be molded so that the pig, when it is in the recesses 43 or 44, can be sent back to the sending station.

It may also be desirable to be seen in the direction of flow to close rear slide sleeve 32 only when the clutch has opened. In this case, the slide sleeve 32 can no longer with the aid of a pressure medium be brought into the closed position, as the control fluid line or the Passage through the channels 50 and 49 is blocked by the valves 53 and 54. That The slide sleeve 32 is then closed with the aid of the springs 55. These ensure in any case for the closing of the slide sleeve 32, if in the upper section of the Annular chamber 30 is no control pressure.

Claims (16)

Patent claims: 1. Fitting for pipelines for the transport of media that have an annular shape Has sealing surface on a transversely to the pipe axis aneadneten element that is connected via at least one web with a sealing sleeve, which is in a housing is arranged coaxially to the pipeline, and around which a slide sleeve sealingly and is displaceably guided, wherein the housing is coaxial to the pipe axis Has bore in which the outside of the slide sleeve slides sealingly, and the The bore wall has a recess in the area of the transverse element, which in the open position the slide sleeve forms a passage with the transverse element while in the closed position the slide sleeve this in sealing engagement with the annular sealing surface occurs, according to patent ... (Patent application P 23 18 165.9>, characterized by the application as a shut-off valve on a separable pipe connection on at least one Side of the separation point, with the housing over the separation point with a connector is connectable. 2. Fitting according to claim 1, characterized in that to both A shut-off valve is arranged on the side of the separation point. 3. Fitting according to claim 1 or 2, characterized in that the Recess is designed as an annular groove. 4. Fitting according to one of claims 1 to 3, characterized in that that the sealing sleeve (25, 28) with several circularly curved webs (41, 42) the transverse element (39, 40) is connected, which in turn has a dome-shaped recess (43, 44), whose axis of symmetry falls into the pipe axis and whose The radius preferably corresponds to that of the pipeline (10). 5. Fitting according to one of claims 2 to 4, characterized in that that the transverse elements (39, 40) on the mutually facing ends plane, perpendicular to the pipeline axis have surfaces which lie against one another and form a parting plane, and that the ends of the slide sleeves (31, 32) extend into Extend the height of the parting line. 6. Fitting according to one of claims 1 to 5, characterized in that that the slide sleeve (31, 32) can be acted upon on both sides with fluid Has piston portion (33, 34). 7. Fitting according to one of claims 1 to 6, characterized in that that a spring (55) acts against the slide sleeve (32), which pushes the slide sleeve (32) to push in the direction of the separation point. 8. Fitting according to one of claims 6 or 7, characterized in that that the fluid lines to act on both sides in the direction of flow We see the rear slide sleeve (32) with corresponding channels (49, 50) in the housing (13) the front shut-off valve are connected that these channels (49, 50) over the separation point in connection with channels in the housing (16) of the rear shut-off valve stand, which are to the cylinder chambers on both sides of the piston section 04) of the rear Guide the slide sleeve (32). 9. Shut-off valve according to claim 8, characterized in that the Channels (49, 50) in the housing of the front shut-off valve a safety valve (53, 54), the valve member of which is not separated from the valve by a Housing portion of the rear valve is held in the open position. 10. Fitting according to one of claims 1 to 9, characterized in that that the housing (11) has a shut-off valve with a connection piece or the housing (15) of the other shut-off valve by a separable one that surrounds the housing (11, 15) Coupling ring can be connected to one another. 11. Fitting according to claim 10, characterized in that the coupling ring (21) preferably as a flange ring of two by means of a joint (58) connected halves (56, 57), the free ends of which by a separable connecting arrangement are connectable to each other. 12. Fitting according to claim 11, characterized in that the connection arrangement dB (2) pivotable about a pivot pin (61 62) arranged on one of the housings (15) Has locking elements (63, 64) which are provided with open slots (65, 66) are, the locking pins (59, 60) receive that means (67, 68) are provided which ensure an equiangular pivoting of the locking elements (63, 64), and that a breathing member (71) engages the locking elements (63, 64), by which the locking elements (63, 64) can be pivoted. 13. Fitting according to claim 12, characterized in that the actuating member is a frog (70) that has two slots in a row, the actuating pins (69, 70) of the locking elements (63, 64) receive, and that an adjusting cylinder (73) acts on the frog (71). 14. Fitting according to claim 12 or 13, characterized in that the slots (65, 66) diverge towards the open ends and the associated, the areas of the locking elements (63, 64) delimiting the slots (65, 66) are longer than the mutually facing areas delimiting the slots. 15.Armatur according to one of claims 1 to 14, characterized by a control device that controls the actuation of the shut-off valve and the separation of the Pipeline connection controls so that initially the slide sleeve (31, 32) is in the closed position is driven and then the pipe connection is disconnected. 16. Fitting according to claim 15, characterized in that first the first slide sleeve (31), seen in the direction of flow, is closed when the pipe connection is disconnected.